WO2021215044A1 - Câble coaxial plat - Google Patents

Câble coaxial plat Download PDF

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Publication number
WO2021215044A1
WO2021215044A1 PCT/JP2020/046606 JP2020046606W WO2021215044A1 WO 2021215044 A1 WO2021215044 A1 WO 2021215044A1 JP 2020046606 W JP2020046606 W JP 2020046606W WO 2021215044 A1 WO2021215044 A1 WO 2021215044A1
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WO
WIPO (PCT)
Prior art keywords
coaxial
flat cable
tape
coaxial flat
connector
Prior art date
Application number
PCT/JP2020/046606
Other languages
English (en)
Japanese (ja)
Inventor
順盟 中山
Original Assignee
東京特殊電線株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東京特殊電線株式会社 filed Critical 東京特殊電線株式会社
Priority to CN202080099994.0A priority Critical patent/CN115485931A/zh
Priority to US17/920,241 priority patent/US20230163493A1/en
Priority to JP2022516841A priority patent/JPWO2021215044A1/ja
Priority to KR1020227032163A priority patent/KR20230002320A/ko
Publication of WO2021215044A1 publication Critical patent/WO2021215044A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/20—Cables having a multiplicity of coaxial lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/53—Fixed connections for rigid printed circuits or like structures connecting to cables except for flat or ribbon cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/62—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to rigid printed circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0861—Flat or ribbon cables comprising one or more screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/594—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures for shielded flat cable
    • H01R12/598—Each conductor being individually surrounded by shield, e.g. multiple coaxial cables in flat structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
    • H01R13/65918—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable wherein each conductor is individually surrounded by shield
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/20—Cables having a multiplicity of coaxial lines
    • H01B11/203—Cables having a multiplicity of coaxial lines forming a flat arrangement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0838—Parallel wires, sandwiched between two insulating layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0846—Parallel wires, fixed upon a support layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0515—Connection to a rigid planar substrate, e.g. printed circuit board

Definitions

  • the present invention relates to a coaxial flat cable, and more particularly to a coaxial flat cable that is used in an electronic device such as a liquid crystal television or a server or between electronic devices so that stress is not applied to a specific coaxial cable by handling or the like. ..
  • Flat cables have excellent workability and flexibility, and are widely used as internal wiring materials and external wiring materials for electronic devices.
  • a coaxial flat cable using a plurality of coaxial cables has been proposed.
  • Patent Document 1 proposes a coaxial flat cable having a large central conductor diameter, a small finished outer diameter, and exhibiting stable high-frequency characteristics.
  • This coaxial flat cable is a coaxial flat cable having a plurality of coaxial cables arranged in parallel at regular intervals and a fixing tape that integrates at least the terminal portions of the plurality of coaxial cables from one side or both sides.
  • the cable is provided on the outer periphery of the central conductor, the dielectric layer provided on the outer periphery of the central conductor and having a gap portion continuous in the longitudinal direction, the outer conductor provided on the outer periphery of the dielectric layer, and the outer periphery of the outer conductor. It has at least an insulating layer.
  • the outer conductor and the center conductor are soldered to the substrate respectively.
  • the stress is concentrated on the soldered portion of the outer conductor or the central conductor, and there is a risk that the soldered portion will be damaged. Damage at the soldered portion causes a problem that the high frequency transmission characteristics of the coaxial flat cable are deteriorated.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a coaxial flat cable in which stress is not applied to a specific coaxial cable even by handling a coaxial flat cable or the like. It is in.
  • the coaxial flat cable according to the present invention is a resin tape in which a plurality of coaxial cables arranged side by side in the width direction and the plurality of coaxial cables are bonded from at least one side or both sides of the terminal portion to integrate the terminal portion.
  • the fixing portions are provided at both ends in the width direction.
  • the resin tape located at the terminal portion is fixed (locking, fitting, crimping, caulking, etc.) to the substrate or the connector. Since the portions are provided at both ends in the width direction, the applied stress can be received by the entire resin tape, and it is possible to prevent the stress from being applied to a specific coaxial cable. As a result, stress concentration on the solder connection portion of the specific outer conductor or center conductor is eliminated, and damage at the solder connection portion can be prevented.
  • “at least” means that the resin tape is always provided in the terminal portion, but the resin tape may be provided in the intermediate portion other than the terminal portion.
  • the fixing portion is a hole or a protrusion that is fitted into a fitting portion included in the substrate or the connector.
  • the fixing portion is a hole or a protrusion
  • the hole or the protrusion is fitted into the fitting portion provided on the board or the connector, and the coaxial flat cable is fixed to the board or the connector.
  • the fixing portion is a notch that is fitted into the fitting portion provided on the substrate or the connector.
  • the fixing portion is a notch
  • the notch is fitted into the fitting portion provided on the board or the connector, and the coaxial flat cable is fixed to the board or the connector.
  • the convex portion or the concave portion is provided on the cover tape.
  • the resin tape is a reinforcing tape provided on the terminal portions of the plurality of coaxial cables
  • the convex portion or the concave portion is provided on the reinforcing tape.
  • the coaxial flat cable is fixed to the substrate or the connector by providing the fixing portions thereof. ..
  • the coaxial cable is provided on a central conductor, an insulator provided on the outer periphery of the central conductor, an outer conductor provided on the outer periphery of the insulator, and an outer periphery of the outer conductor.
  • the central conductor and the outer conductor are the portions that include at least the provided outer body and are solder-connected to the substrate or the connector.
  • the insulator has any one of a solid structure, a hollow structure and a foam structure, and is preferably a hollow structure.
  • a coaxial flat cable that is used in or between electronic devices such as a liquid crystal television or a server and that does not apply stress to a specific coaxial cable even when the coaxial flat cable is handled. Can be done.
  • the applied stress can be received by the entire resin tape, and it is possible to prevent stress from being applied to a specific coaxial cable, so that stress concentration on the solder connection part of a specific outer conductor or center conductor is eliminated, and solder connection is eliminated. It is possible to prevent the part from being damaged.
  • FIG. 1 It is sectional drawing of the coaxial cable which constitutes a coaxial flat cable, (A) is an example of a solid insulator, and (B) is an example of a hollow insulator. It is a top view which shows the form of the coaxial flat cable after terminal processing. It is a top view (A) and a side view (B) which show the form after soldering a coaxial flat cable provided with a notch as a fixing part to a substrate. It is a plan view (A) and a side view (B) which show the form after soldering a coaxial flat cable provided with a hole as a fixing part to a substrate.
  • the coaxial flat cable 20 has a plurality of coaxial cables 10 arranged side by side in the width direction X and at least the terminal portion 21 of the plurality of coaxial cables 10 on one side.
  • it is a coaxial flat cable 20 that has a resin tape 11 that is bonded from both sides and integrates the terminal portion 21, and each of the plurality of coaxial cables 10 is solder-connected to a substrate 30 or a connector (not shown).
  • the resin tape 11 located at the terminal portion 21 has fixing portions 21a fixed (locking, fitting, crimping, caulking, etc.) to the substrate 30 or the connector at both ends in the width direction X. It is characterized by being provided in.
  • the resin tape 11 located at the terminal portion 21 is fixed (locked, fitted, crimped,) to the substrate 30 or the connector. Since the fixing portions 21a to be crimped or the like are provided at both ends in the width direction X, the applied stress can be received by the entire resin tape, and it is possible to prevent the specific coaxial cable 10 from being stressed. As a result, the stress concentration of the specific outer conductor 3 and the central conductor 1 on the solder connecting portions 42 and 41 is eliminated, and the solder connecting portions 42 and 41 can be prevented from being damaged.
  • the term "at least" means that the terminal portion 21 is always provided with the resin tape 11, but the intermediate portion 22 other than the terminal portion may also be provided with the resin tape 11.
  • the coaxial cable 10 constitutes the coaxial flat cable 20, and as shown in FIGS. 1 to 6, a plurality of coaxial cables 10 are arranged side by side in the width direction X.
  • the coaxial cable 10 includes a central conductor 1, an insulator 2 provided on the outer periphery of the central conductor 1, an outer conductor 3 provided on the outer periphery of the insulator 2, and an outer circumference of the outer conductor 3. It is provided with at least an outer cover 4 provided on the.
  • the coaxial cable 10 has the central conductor 1 and the outer conductor 3 at the portions solder-connected to the substrate 30 or the electrodes 31 and 32 of the connector.
  • the central conductor 1 is composed of one wire extending in the longitudinal direction Y of the coaxial cable 10, or is formed by twisting a plurality of wires. It is a thing.
  • the type of the strand is not particularly limited as long as it is made of a good conductive metal, but a good conductive metal conductor such as a copper wire, a copper alloy wire, an aluminum wire, an aluminum alloy wire, or a copper-aluminum composite wire, or Those having a plating layer on their surfaces can be preferably mentioned. From the viewpoint of high frequency, copper wire and copper alloy wire are particularly preferable.
  • the plating layer a solder plating layer, a tin plating layer, a gold plating layer, a silver plating layer, a nickel plating layer and the like are preferable.
  • the cross-sectional shape of the wire is not particularly limited, but the cross-sectional shape may be circular, substantially circular, or square.
  • the cross-sectional shape of the central conductor 1 is also not particularly limited. It may be circular (including an ellipse) or rectangular, but it is preferably circular.
  • the outer diameter of the central conductor 1 is preferably as large as possible so that the electrical resistance (AC resistance, conductor resistance) is small, but in order to reduce the final outer diameter of the coaxial cable 10, for example, 0.09. The range of about 1 mm can be mentioned.
  • An insulating film (not shown) may be provided on the surface of the center conductor 1 if necessary. The type and thickness of the insulating film are not particularly limited, but for example, one that decomposes well at the time of soldering is preferable, and a thermosetting polyurethane film or the like can be preferably mentioned.
  • the insulator 2 is an insulating layer having a low dielectric constant provided continuously on the outer periphery of the central conductor 1 in the longitudinal direction.
  • the material of the insulator 2 is not particularly limited and is arbitrarily selected according to the required impedance characteristics.
  • PFA ⁇ 2.1
  • ETFE ⁇ 2.5
  • FEP ⁇ 2.1
  • Fluorine-based resins having a low dielectric constant of 2.0 to 2.5 are preferable, and PFA resins are particularly preferable.
  • the material of the insulator 2 may contain a colorant.
  • the thickness of the insulator 2 is also not particularly limited and is arbitrarily selected according to the required impedance characteristics, but is preferably in the range of, for example, about 0.15 to 1.5 mm.
  • the method for forming the insulator 2 is not particularly limited, but any of the solid structure, the hollow structure, and the foamed structure can be easily formed by extrusion.
  • the insulator 2 may have a solid structure shown in FIG. 8A, a hollow structure shown in FIG. 8B, or a foamed structure (not shown).
  • the hollow structure has a gap portion 2A inside the structure, and for example, the gap portion 2A can be surrounded by an inner annular portion 2B, an outer annular portion 2C, and a connecting portion 2D, or the like.
  • a hollow structure or a foamed structure is used, the material density of the insulator 2 is reduced, and there is an additional effect that the insulator 2 can be softened.
  • the gap portion 2A is continuously provided in the insulator 2, but its form may be round or rectangular, and is not particularly limited.
  • the hollow structure insulator 2 can be formed by extruding resin on the outer periphery of the central conductor 1 running on the extrusion die.
  • the thickness of each of the inner annular portion 2B, the outer annular portion 2C, and the connecting portion 2D is not particularly limited, but is, for example, in the range of about 0.01 mm to 0.05 mm, and is outside the formed hollow structure insulator 2.
  • the diameter can be, for example, in the range of about 0.4 mm to 1.0 mm.
  • the outer conductor 3 is provided on the outer periphery of the insulator 2, and may be a braided thin wire or a horizontally wound one, or an insulating tape with a metal layer (for example, a polyethylene terephthalate film with a copper layer). It may be a combination of both of them.
  • a thin wire horizontal winding 3A is provided on the outer periphery of the insulator 2, and an insulating tape 3B with a metal layer is provided so as to cover the thin wire horizontal winding 3A, but the configuration is not limited to this.
  • the thickness of the outer conductor 3 is not particularly limited, but is in the range of, for example, about 0.01 mm to 0.15 mm.
  • the outer cover 4 is provided on the outer periphery of the outer conductor 3, and the material thereof is not particularly limited as long as it has an insulating property.
  • the insulating tape 4A provided with the adhesive layer 4B on one side can be spirally wound, but the present invention is not limited to this form.
  • the adhesive layer 4B various materials applied to the coaxial cable 10 can be used.
  • a polyester-based thermoplastic adhesive resin or the like can be preferably mentioned, and as the insulating tape 4A, polyethylene terephthalate can be used. Polyester films such as films and polyethylene terephthalate films can be preferably mentioned.
  • the outer cover 4 is also polyester. It is preferably a film.
  • the coaxial flat cable 20 may be provided with a shield layer (not shown), if necessary.
  • the shield layer is provided on, for example, the resin tape 11 shown in FIG.
  • a tape composed of at least a metal foil and a conductive adhesive layer provided on one surface of the metal foil can be exemplified, but the layer structure is particularly limited as long as the shield function can be exhibited. Not done.
  • the shield layer can act so as to keep the capacitance and the external inductance between the central conductor and the shield layer uniform, and it is possible to prevent an impedance mismatch at this portion.
  • the resin tape 11 constitutes the coaxial flat cable 20, and as shown in FIGS. 1 to 7, at least the terminal portions 21 of the plurality of coaxial cables 10 arranged side by side in the width direction X are viewed from one side or both sides.
  • the terminal portions 21 are laminated and integrated.
  • the resin tape 11 include, but are not limited to, the cover tape 11a, the reinforcing tape 11b, and the bonding portion 11c between the cover tape 11a and the reinforcing tape 11b. “At least” means that the terminal portion 21 is always provided with the resin tape 11 (11a, 11b, 11c), but even if the intermediate portion 22 other than the terminal portion is also provided with the resin tape 11 (11a). It means good. As shown in FIGS.
  • the “double-sided” refers to the upper and lower surfaces of a plurality of coaxial cables 10 arranged side by side in the width direction X
  • the “single-sided” means the upper and lower surfaces of the coaxial cables 10.
  • it is one surface (for example, the lower surface) of a plurality of coaxial cables 10 arranged side by side in the width direction X.
  • the resin tape 11 shown in FIGS. 1, 3, 4 and 6 is provided as a cover tape 11a on the entire surface including the terminal portion 21 and the intermediate portion 22 of the plurality of coaxial cables 10, and is provided as a cover tape 11a (A).
  • the two cover tapes 11a and 11a are provided so as to sandwich and cover the entire cover tapes 11a and 11a from both sides.
  • the surface structure of the cover tape 11a covering the coaxial cable 10 may be flat or uneven, and the surface structure (for example, the degree of flatness, the degree of unevenness, etc.) may be formed.
  • the degree of hardness, etc. is uniform from the terminal portion 21 to the intermediate portion 22 in the longitudinal direction Y and the width direction X, and it is preferable that the configuration does not have a special processed portion. By doing so, it is possible to obtain a low-cost coaxial flat cable 20 that is not specially processed and is easy to handle.
  • the resin tape 11 shown in FIGS. 2, 5 and 7 (B) is a reinforcing tape 11b provided on the terminal portion 21 of a plurality of coaxial cables 10.
  • fixing portions 21a are provided at both ends of the reinforcing tape 11b in the width direction X.
  • the reinforcing tape 11b is provided only on the terminal portion 21 of the plurality of coaxial cables 10 in the longitudinal direction Y, and the intermediate portion 22 is a non-integrated portion. In the non-integrated portion, the intermediate portion 22 can be easily deformed, and the degree of freedom at the time of wiring in the electronic device can be improved.
  • the length of the reinforcing tape 11b in the longitudinal direction Y may be at least as long as the protrusion 12, the notch 13, the hole 14, and the like are provided, and is preferably about 5 to 20 mm, for example.
  • the resin tape 11 shown in FIGS. 3, 6 and 7 (C) includes a cover tape 11a that sandwiches and integrates the entire plurality of coaxial cables from both sides, and a terminal portion 21 of the plurality of coaxial cables 10. It is composed of a reinforcing tape 11b attached to one side of the cover tape 11a.
  • fixing portions 21a are provided at both ends in the width direction X thereof.
  • the cover tape 11a and the reinforcing tape 11b have the same configurations as those described in (a) and (b).
  • the cover tape 11a and the reinforcing tape 11b described above are usually composed of a base material and an adhesive layer.
  • the base material of the cover tape 11a is not particularly limited, but a polyester film such as polyethylene terephthalate or polyethylene naphthalate can be preferably used.
  • the thickness of the base material is arbitrarily selected within the range of about 0.025 mm to 0.1 mm.
  • the adhesive layer is also not particularly limited, but it is desirable that the material can be bonded to the outer body 4 to be bonded with good adhesiveness, and for example, a polyester-based thermoplastic adhesive resin layer and the like can be preferably mentioned.
  • the thickness of the adhesive layer is arbitrarily selected within the range of about 0.02 mm to 0.035 mm.
  • the base material of the reinforcing tape 11b is not particularly limited, and a polyester film such as polyethylene terephthalate or polyethylene naphthalate or a polycarbonate film can be preferably used. These base materials are also excellent in dimensional stability, and it is said that dimensional changes are unlikely to occur due to the fitting force applied when connecting to the connector, or even when the temperature changes or the time elapses. There are advantages.
  • the thickness of the base material is arbitrarily selected within the range of about 0.025 mm to 0.3 mm.
  • the adhesive layer is also not particularly limited, but it is desirable that the material can be bonded to the outer body 4 to be bonded with good adhesiveness, and for example, a polyester-based thermoplastic adhesive resin layer and the like can be preferably mentioned. The thickness of the adhesive layer is arbitrarily selected within the range of about 0.02 mm to 0.05 mm.
  • the bonding portion 11c composed of the cover tape 11a and the reinforcing tape 11b is a combination of the cover tape 11a and the reinforcing tape 11b described above, and thus the description thereof will be described here. Is omitted.
  • the coaxial flat cable 20 is composed of terminal portions 21 located on both sides in the longitudinal direction Y and intermediate portions 22 other than the terminal portions 21.
  • the terminal portion 21 is composed of a fixing portion 21a and a terminal processing portion 21b.
  • the fixing portions 21a are provided at both ends of the resin tape 11 located at the terminal portion 21 in the width direction X, and are fixed to the substrate 30 or the connector as shown in FIGS. 10 to 13. Fixing is performed between the fixing portion 21a and the fitting portion 33 by locking, fitting, crimping, caulking or the like.
  • the terminal processing unit 21b shows a case where it has not been processed yet in the examples of FIGS. 1 to 6, but the terminal is processed into the form shown in FIG.
  • the terminal processing portion 21b is processed so that the central conductor 1, the insulator 2, and the outer conductor 3 are exposed, respectively, and as shown in FIGS. 10 to 13, the central conductor 1 is soldered to the electrodes 31 of the substrate 30.
  • the outer conductor 3 is soldered to the electrode 32 of the substrate 30 to become the solder connection portion 41.
  • the coaxial flat cable 20 is not fixed at the solder connecting portions 41 and 42 as in the conventional case, but is fixed between the fixing portion 21a and the fitting portion 33.
  • the stress applied to the solder connection portions 41 and 42 in the past can be received by the entire resin tape, and it is possible to prevent the stress from being applied to the solder connection portions 41 and 42 of the specific coaxial cable 10.
  • the stress concentration of the specific central conductor 1 and the outer conductor 3 on the solder connecting portions 41 and 42 is eliminated, and the solder connecting portions 41 and 42 can be prevented from being damaged.
  • the form of the fixing portion 21a is not particularly limited as long as it is locked, fitted, crimped, crimped, or the like with the fitting portion 33 of the substrate or the like.
  • the notch 13 as shown in FIG. 10 is preferable.
  • the notch 13 may be a semi-circular notch as shown in FIGS. 1 to 3, or may be a rectangular notch as shown in FIGS. 9 and 10.
  • the fixing portion 21a is preferably a protrusion 12 as shown in FIGS. 4 to 6, 12 and 13, for example.
  • the protrusion 12 may be a protrusion that projects the end side of the cover tape 11a in the longitudinal direction Y in the width direction X as shown in FIG. 4, or is reinforced as shown in FIGS. 5, 6 and 12. It may be a protrusion protruding from both ends of the tape 11b in the width direction X.
  • the fixing portion 21a is preferably a hole 14 as shown in FIG. 11, for example.
  • the hole 14 is provided in the reinforcing tape 11b in the example of FIG. 11, it may be provided in the cover tape 11a in the same manner as the notch 13 (not shown).
  • the fixing portion 21a may be crimped or crimped.
  • the coaxial flat cable 20 thus obtained is used in or between electronic devices such as LCD TVs and servers, and stress is not applied to the specific coaxial cable 10 even when the coaxial flat cable 20 is handled. Can be done. As a result, stress concentration on the solder connection portion of the specific outer conductor or center conductor is eliminated, and damage at the solder connection portion can be prevented.
  • a plurality of coaxial cables 10 arranged side by side in the width direction X may be arranged at a constant pitch, or may be arranged so that adjacent coaxial cables 10 come into contact with each other. .. Further, as shown in FIGS. 2 and 9 to 13 and the like, two pieces that are in contact with each other as a pair may be arranged side by side at regular intervals.
  • the coaxial flat cable 20 can increase the outer diameter of the central conductor 1 without increasing the outer diameter of the coaxial cable 10.
  • the effective cross-sectional area of the central conductor 1 can be increased to suppress an increase in high frequency resistance (AC resistance). Furthermore, it is not easily crushed during manufacturing (for example, when pressurizing a heat seal or the like) or during wiring work, and the distance between the center conductor 1 and the outer conductor 3 does not change, so that the characteristic impedance is stable and the high frequency characteristics are stable. It becomes possible to make it.
  • AWG32 outer diameter of about 0.24 mm obtained by twisting seven silver-plated annealed copper wires having a diameter of 0.08 mm was used as the central conductor 1.
  • PFA resin manufactured by DuPont
  • the gap portion 2A is the inner annular portion 2B and the outer annular portion.
  • the thickness of the inner annular portion 2B is 0.05 mm
  • the thickness of the outer annular portion 2C is 0.05 mm
  • the thickness of the connecting portion 2D is 0.05 mm
  • the hollow structure (insulator 2). ) was 0.60 mm
  • the void ratio of the void portion 2A was 30% with respect to the area of the entire insulator (entire hollow structure).
  • the dielectric constant ⁇ was about 1.6.
  • outer conductor 3 38 tin-plated annealed copper wires having a diameter of 0.05 mm were used, and the outer conductor 3 was wound around the outer circumference of the insulator 2 at a pitch of 12 mm using a horizontal winding shield machine to obtain a horizontal thin wire horizontal winding 3A. Further, a 0.004 mm thick polyethylene terephthalate film (insulating tape 3B with a metal layer) having a 0.008 mm thick copper layer formed therein is cut to a width of 2.5 mm, and the copper layer is laterally formed using a tape winder. The thin wire of the winding was wound on the horizontal winding 3A side with 1 / 3.5 wrap.
  • a 0.004 mm thick polyester tape (insulating tape 4A) provided with a 0.001 mm thick polyester thermoplastic resin (adhesive layer 4B) on one side is cut to a width of 3.0 mm, and a tape winding machine is used. Was used to wrap the adhesive layer 4B on the outer conductor side with 1/3 wrap.
  • [Coaxial flat cable] (Example 1) 16 of the obtained coaxial cables 10 are prepared, and as shown in FIGS. 2 and 9, two coaxial cables that are in contact with each other as a pair are arranged side by side at regular intervals, and then covered tape 11a is used as shown in FIG. The entire surface was laminated from both sides and integrated to form the coaxial flat cable 20 shown in FIG. 7 (A).
  • the cover tape 11a was attached by cutting a 0.025 mm-thick polyethylene terephthalate film base material having a 0.035 mm-thick polyester thermoplastic resin (adhesive layer) on one side and cutting it to a width of 25 mm. ..
  • the coaxial flat cable 20B was cut to a predetermined length, and the notches 13 were provided in a semicircular shape with a radius of 1.5 mm at both ends of the cover tape 11a in the width direction X at a position 5 mm from the end face in the longitudinal direction Y (). See FIG. 1).
  • the coaxial flat cable 20A thus produced was attached to the substrate.
  • the notch 13 was fitted into the fitting portion, the central conductor 1 was soldered to the solder connection portion 41, and the outer conductor 3 was soldered to the solder connection portion 42.
  • Example 2 16 of the obtained coaxial cables 10 are prepared, and as shown in FIGS. 2 and 9, two coaxial cables that are in contact with each other as a pair are arranged side by side at regular intervals, and then the reinforcing tape 11b is applied as shown in FIG.
  • the coaxial flat cable 20 shown in FIG. 7B was formed by laminating them on one side and integrating them.
  • the reinforcing tape 11b is a polyethylene terephthalate film base material having a thickness of 0.125 mm provided with a polyester thermoplastic resin (adhesive layer) having a thickness of 0.042 mm on one side, and has a width X of 25 mm and a longitudinal direction of 10 mm. The cut pieces were used for bonding.
  • the coaxial flat cable 20 was cut to a predetermined length, and the notches 13 were provided at both ends in the width direction X at a position 5 mm from the end face of the reinforcing tape 11b in a semicircular shape with a radius of 1.5 mm (see FIG. 2). ).
  • the coaxial flat cable 20B thus produced was attached to the substrate 30 as shown in FIGS. 10A and 10B. As shown in FIG. 10, the notch 13 was fitted into the fitting portion 33, the central conductor 1 was soldered to the solder connection portion 41, and the outer conductor 3 was soldered to the solder connection portion 42.
  • Example 3 16 of the obtained coaxial cables 10 are prepared, and as shown in FIGS. 2 and 9, two coaxial cables that are in contact with each other as a pair are arranged side by side at regular intervals, and then covered tape 11a is used as shown in FIG. The entire surface was bonded and integrated from both sides, and the reinforcing tape 11b was further bonded to the terminal portion 21 on one side of the cover tape 11a to form the coaxial flat cable 20 shown in FIG. 7 (C).
  • the cover tape 11a and the reinforcing tape 11b used were bonded using the same ones as in Example 1 and Example 2, respectively.
  • the coaxial flat cable 20 was cut to a predetermined length, and the protrusions 12 were provided at both ends in the width direction X at a position 5 mm from the end face of the bonded portion 11c with a protrusion length of 1.5 mm (see FIG. 6).
  • Example 4 16 of the obtained coaxial cables 10 are prepared, and as shown in FIGS. 2 and 9, two coaxial cables that are in contact with each other as a pair are arranged side by side at regular intervals, and then the reinforcing tape 11b is applied as shown in FIG.
  • the coaxial flat cable 20 shown in FIG. 7B was formed by laminating them on one side and integrating them.
  • the reinforcing tape 11b is a polyethylene terephthalate film base material having a thickness of 0.125 mm provided with a polyester thermoplastic resin (adhesive layer) having a thickness of 0.042 mm on one side, and has a width X of 25 mm and a longitudinal direction of 10 mm. The cut pieces were used for bonding.
  • the coaxial flat cable 20 was cut to a predetermined length, and both ends of the reinforcing tape 11b from 7 mm to 10 mm were cut out as protrusions 12 to provide protrusions 12 having a length of 7 mm (see FIG. 13).
  • the coaxial flat cable 20 thus produced was attached to the substrate 30 as shown in FIGS. 13A and 13B. As shown in FIG. 13, the protrusion 12 was fitted to the fitting portion 33, the central conductor 1 was soldered to the solder connection portion 41, and the outer conductor 3 was soldered to the solder connection portion 42.

Abstract

L'invention aborde le problème de la production d'un câble coaxial plat permettant de réaliser des caractéristiques stables de transmission à haute fréquence, par rapport à une structure dans laquelle la contrainte n'est pas appliquée à un câble coaxial spécifique lorsque le câble coaxial plat est manipulé. La solution selon l'invention consiste à résoudre le problème susmentionné par un câble coaxial plat (20) comprenant une pluralité de câbles coaxiaux (10) agencés côte à côte dans la direction de la largeur (X), et une bande de résine (11) qui permet d'intégrer au moins des sections d'extrémité (21) des câbles coaxiaux (10) à partir d'une surface ou des deux surfaces, chaque câble de la pluralité de câbles coaxiaux (10) étant connecté par brasure à un substrat (30), ou à un connecteur. La bande de résine (11) positionnée aux sections d'extrémité (21) est conçue de sorte qu'une section fixe (21a) qui est fixée au substrat ou au connecteur est disposée aux deux sections d'extrémité dans la direction de la largeur (X).
PCT/JP2020/046606 2020-04-21 2020-12-14 Câble coaxial plat WO2021215044A1 (fr)

Priority Applications (4)

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CN202080099994.0A CN115485931A (zh) 2020-04-21 2020-12-14 同轴扁平电缆
US17/920,241 US20230163493A1 (en) 2020-04-21 2020-12-14 Coaxial flat cable
JP2022516841A JPWO2021215044A1 (fr) 2020-04-21 2020-12-14
KR1020227032163A KR20230002320A (ko) 2020-04-21 2020-12-14 동축 플랫 케이블

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JP2020075520 2020-04-21
JP2020-075520 2020-04-21

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US (1) US20230163493A1 (fr)
JP (1) JPWO2021215044A1 (fr)
KR (1) KR20230002320A (fr)
CN (1) CN115485931A (fr)
TW (1) TW202141540A (fr)
WO (1) WO2021215044A1 (fr)

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JPWO2021215044A1 (fr) 2021-10-28
CN115485931A (zh) 2022-12-16
KR20230002320A (ko) 2023-01-05
US20230163493A1 (en) 2023-05-25

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